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|Title:||Preparation of silica nanoparticles from sodium orthosilicate in inverse microemulsions|
|Authors:||Gan, L.M. |
|Source:||Gan, L.M., Zhang, K., Chew, C.H. (1996-05-15). Preparation of silica nanoparticles from sodium orthosilicate in inverse microemulsions. Colloids and Surfaces A: Physicochemical and Engineering Aspects 110 (2) : 199-206. ScholarBank@NUS Repository. https://doi.org/10.1016/0927-7757(95)03437-4|
|Abstract:||Sodium orthosilicate has been used to synthesize nanometer silica particles (5-20 nm) in water-in-oil microemulsion systems containing cyclohexane and a mixture of non-ionic surfactants, without using a cosurfactant. The particle sizes of silica formed in the microemulsion systems were affected by the pH and the concentration of sodium orthosilicate. Spherical silica particles formed in a wide range of pH (2-11) can easily be observed by transmission electron microscopy. Silica particles produced under basic conditions were more uniform in size, but larger specific surface areas (350-400 m2 g-1) of the calcined silica powders were only obtained from samples prepared in an acidic medium.|
|Source Title:||Colloids and Surfaces A: Physicochemical and Engineering Aspects|
|Appears in Collections:||Staff Publications|
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